Year	Percent
1950	14.58112
1955	14.70769
1960	14.29775
1965	14.4008
1970	14.56068
1975	14.67842
1980	14.7023
1985	14.73442
1990	14.85236
1995	14.89871
2000	14.98931
2005	14.93439
2010	15.20017
2015	15.45187
2020	15.40676
2025	14.89811
2030	14.32879
2035	13.81466
2040	13.27805
2045	12.68891
2050	12.02612
2055	11.36541
2060	10.75162
2065	10.1712
2070	9.6598
2075	9.14642
2080	8.66266
2085	8.21943
2090	7.7981
2095	7.42713
2100	7.09361